Coal-handling plant



Pebl. 8,1927.,

G. s. JAXON COAL HANDLING PLANT Filed DeG. v.' 1925 4 Sheets-Sheet Feb. s, 1927,

G. s. JAxoN coAL HANDLING PLANT Filed Dec. v, 1925 Y 4 sheets-Sheet 2 Feb. 8,1927.

COAL HANDLING PLANT G., S. JAXON Filed Dec: .v '7, 1925'v 4 sheets-sheet a' WLM? M4 v Feb. 8, i927.

G. S. JAXON CAL HANDLING PLANT 4 Sheets-Sheet 4 Filed Deo. 7, 1925 Patented Feb. 8, 1927.

f UNITED STATES PATENT oFFlCE.

GEORGE S. JAXON, OF HUNTINGTON, WEST VIRGINIA, ASSIGNO TO LmK-BELT COM- PAN'Y, OF CHICAGO, ILLINOIS,

A CORPORATION OF ILLINOIS.

COAL-HANDLING PLANT.

Application filed December 7, 1925. Serial No'. 73,588.

My invention.A relates to an improvement in screenings and relates particularly to horizontal or generally horizontal screens or screening assemblies for screening or grading coal or other materials. One object is a provision of a screen whereby coal or similar materials may be screened, graded and conveyed for. Storage or shipment with a 'minimum shock or breakage. Other objects will appear from time to time in the course of my specification and claims.

I illustrate my invention more or less diagrammatically in the accompanying drawings, Wherein- Figure 1 is a side elevation;

Figure 2 is an enlarged section on the line 2-2 of Figure a;

Figure 3 is a section on the line 3 3 of Figure 1;

Figure 4 is an enlarged section on the line 44 of Figure 1;

Figure 5 is an enlarged section on` the line 5-5 of Figure 1;

Figure 6 is an enlarged section on the line 6-6 of Figure 1;

Figure 7 is an enlarged section on the line 7 7 of Figure 1;

Figure 8 is an enlarged longitudinal sec tion along an endless conveyor; A

Figure 9 is an enlarged section on the line 9-9 of Figure 3; and

Figure 10 is a section similar to Figure 4 through a modified form.

Like parts are indicated by like symbols throughout the specification and drawings.

Referring initially to Figures 1v and 2, A A are any suitable foundation members upon which are erected the frame members A1 A1 upon which the below described screening and conveying mechanisms are mounted. Between the vertical frame members A1 A1 are spaced a plurality of tracks A1 A10 upon which are supported any suitable conveying members A12.

B indicates a delivery chute or spout or any suitable means for delivering the coal or' other material to the screening mechanism. B1 B2 are horizontal track members upon which is supported the horizontal screen structure1 generally denominated as B3 which consists of the inclined member 131 the intermediate horizontal member B5 and the lower horizontal member B6. B7 are roller engaging members B8.

lany suitable motor or driving means and B12 is a link whereby the movement of the eccentric is transmitted to the screen. It will be understood that in order to eie'ct a feeding movement along the horizontal screen it is moved relatively slowly in the desired direction of conveyance and is withdrawn sharply in the opposite direction.

Ciis an upper material receiving member provided with the screening section C1 and terminating with the plane pla'te C2 rovided with an overhanging inclined edged lip C3 which overhangs a conveyor or boom later to be described. The plate C2 may be provided with a ,removable screening section C*q upon the removal of which all the coal passing over the screen C1 may be delivered to the plate D. v

D isa second generally horizontal conveying plate at a lower level than the plate sections C and C2. It is provided with the screen section D1 and the perforate screen sections D2 D3 and in turn terminates in an inclined edged overhanging section D1. The screening section D3 is illustrated as forming a removable gate member, when it is desired to discharge the material conveyed along the member D in its entirety to the screen E1 and thus eventually to the boom E is a conveying plate which also serves as bottom `of the screen structure and underlies the screen sections C1 D1 and D2. Con` tinuing on a level with it is the perforated screen section E1 communicating with the plane conveying section E2 which in turn is broken by a screening section or perforated slide, gate or plate, E3, and terminates in an overhanging inclined edged discharge section E4. E5 is a hinged go-down plate adapted to communicate with the discharge member E4 or to be dropped into the,v position shown in dotted lines in Figure 2.V

G is a lower plane conveying plate which also serves as part of the bottom of the '1 less conveyor K.

'of the conveyor.

screen, structure. it underlies the screen sections E1 E3 and the conveying sections E3. Itis provided with a removable gate G1 and terminates in the inclined edged overhanging discharge member G3.

Referrin more particularly to Figures 3 and 4 generally indicatesan endless conveyor belt the details of which are shown in Figure 8. It may consist of a pairl of laterally spaced chains H1 H1 connected by` cross flights or Scrapers H12. H3 is any plane surfaced supporting member for theV support of such chain, which is positioned beneath the outwardly projecting discharge member C3 of the screening member C. lt is provided with a gate H1 adapted to communicate with a chute H3 which in turn is adapted to deposit the material downwardly directed therealong to the endless mixing conveyor K. H3 is a rescreen section at one end of the horizontal section H3, and downwardly inclined in relation thereto. lt communicates with achute H'I which deliv-v ers the material passing 'through the screen H6 to the lower stretch 'of the endless conveyor H which serves to convey it to the left, as shown in Figure- 4 along the conveying plate H8 to the screwv -conveyor L. Pivoted adjacent the rescreening member H3 is any suit-able boom structure H1o provided with the plates H11 H12 along which extends the endless conveyor H. H13 is a drive sprocket for the endlessl conveyor H, the power source for which is not shown and forms no part of the present invention and H14 is a guide sprocket at the opposite end H1.5 generally indicates anysuitable housing mechanism for raising or lowering the boom H10 for example by means of' the cable H13. l Referring more particularly to Figure 5 illustrate an endless conveyor generally slmilar to the endless conveyor H and passing beneath the overhanging discharge section D4, andfpassing about the sprocket'I1 and extending about a boom I3 generally similar to the boom H1. I3 is a -supporting plate similar to the plane H3. It is providedwith the gates I1 I5 one communicating with the chute I3l leading to the conveyorK and the other communicating directly with the space above the conveyor K. 17 is anysuitable re-v screen section adapted to communicate with the plate I3 and thus with the lower part of the endless conveyor II, whereby the material so discharged is conveyed to the left to the screw conveyor L. 5

Referring particularly to Figure 6 J is a discharge hopper underlying the gate G1. Communicating with it is the hopperor chute section J1 underlying the gate K2 in` `the upper supporting plate K1 of the end- J 2 is a chute extending downwardly from the hopper J and in communication with the subsidiary chute -J3 conveyorsL and L1 veach discharge their Leia-rrr and thus with the hopper .l1 which underlies thebreak o'r aperture K3 in the lower supporting plate K1 of the endless conveyor K. J3 is any suitable terminal or discharge chute. lt will be understood that the screw material into the hopper J.

Referring more particularly t Figure 7 M is an endless conveyor generally similar to the conveyorsH and l and passing about the sprocket M1 and the loading boom M2. M3is an upper supporting plate therefor broken by the rescreen sections M'1 whereby the material passes to the lower stretch of the endless conveyor and along the-lower supporting plate M5 to the screw conveyor L1. 'M3 is a gate communicating with the lower stretch of the endless mixing conveyor K. IWhereas l". have shown a screw conveyor, obviously other types of conveyor may be used for the same purpose. A l

Referring more particularly to .Figure 9 the endless conveyor K passes over the upper supporting plate K1 and the lower supporting pla-te K1. The upper supporting plate may be broken by the gate K2 discharging to the chute J1 and thus to the' hopper J. The conveyor passes about the sprockets K3 K7 `and is driven from any suitable source of power not herein shown. lReferring more particularly to the screw conveyors'L and L1 and having reference to Figures 1 and 2 they rotate respectively in the housings or drives L2 L3 being rotated for example through the pulleys L14 L3 from any suitable power source or sources not herein shown. They are preferably rotated.v to discharge ma rial from opposite sldes into the hopper If desired the rescreen section ll/I1 may be replaced by a solid section in order to permit run of mine to be shipped over the boom M.

N'is any vsuitable refuse trough adapted to receive material picked from the various screen sections and reciprocating with the screen. It discharges into a terminal chute N1 adapted to deliver material into the refuse bin N2 whence it may be discharged for l Vshown in Figure 10, the material discharged over the overhanging conveying section C3. e.

O3 is the downwardly inclined rescreen section corresponding' to theV rescreen section H of Figuree and communicating with the pivotedloadingbom O'1 which is adapted to. be reciprocated in unison with the conveyor O. 1

The chute O3 is adapted to deliver mate- A' rather than as limiting vme to lny specificr rocated along the rollers O" throu h the link O8 to convey the material to t el left as shown in Figure lOlto the screw conveyor L.

It will be realized,- that whereas I have illustrated a practical and operative device that nevertheless many changes might be made in the size,rshape, number and disposition of parts without departing from the spirit of my invention and that I wish my drawings and description to be taken as in a broad sense illustrative and diagrammatic showing. For example, Whereas I have illustrated an installation in which four tracks are employed, my invention is also applicable to installations of two or three tracks.

" l have illustrated both reciprocating and endless conveyor booms, but obviously anv other or mine run coal.

suit-able form of boom may be employed.

The use and operation of my invention are as follows:

The mixed material to be graded is discharged down the spout or the discharge means B. A particularlyhappy application for my invention is the screening of mixed Such coal vpasses over the screening section C1 which in the particular example of my invention herein shown may be suiciently coarse to permitthe passage of all but the light or lump coal. The lumps pass outwardly along the section C2 and over the dischargesection C5 to the lendless conveyor H. It will be noted that the large lumps are removed from the screen as fast as they are graded and therefore that they are not subjectedto further dumping or degradation. inthe course of other screening and picking. The endless conveyor H passes the lump over the rescreen section H5 the fines being further recovered and returned by the lower stretch ofy the conveyor H to the screw conveyor L. The lump so rescreened passes downwardly along the leading boom H1", along a gradual slope until linally discharged into the conveyor A12, with a minimum. of dropping or breakage and consequent degradation. Picking may take place either along the screen conveying sections C C1 and C2 or along the lendless conveyor H, or both, the picking length being thus considerably increased.

The next grade, for example egg, is passed through the screen D1 D2 and therefore passes to the right along the plateAD, as shown in Figure 2. The finer grades pass through the Screen to the lower deck E. The egg, or the second grade separated, whatever it may be, is further resereened at the screen section D3 just before it is discharged over the terminal section D4 to the endless conveyor I. Like the lump it passes over the resereen section I7, the rescreenings being returned to the screw conveyor L along the plate I5 as shown in Figure 5. The graded portion passes downwardly along the loading boom I2 for final disposal. l

It will be noted that the material conveyed by the endless yconveyors to the loading booms passes over a gate H4 in one ease and over the gates I4 in the other. Then the e gates are'open the material instead of passing on t o the loading booms passes downwardly to the mixing conveyor K, as shown for example in Figure 9 and may pass to the right along suchv conveyor. It may then be discharged through the gate K2 through the chutes J 2 J2 and J5 or it lnay pass over the right end ot the plate K1, asy shown in Figure 9 for deposit upon the terminal endless conveyor or loading boom M. Thus by use of the mixing conveyorl it is possible to direct one or both of the cleaned and picked lump and egg along such conveyor for delivery either down the chute J5 or along the terminal loading boom M2.

The liner grades of the material pass along the deck E across the screen vsections. El E5 and may be delivered to either of the terminals of the discharge sections Et or G2 'depending upon the position of the hinged gate or go-down plate E5. The removal of the screen E5 and the opening of the gateGl permits the discharge of all the ner material downwardly along the chute J2 and' thus through the chute or spout J5.

Run of mine coal or all grades of any material so produced may be delivered down the chute J5 when the screen E3 and the gate G1 are opened and when thel egg and lump are being delivered to the mixing conveyor K and the gate K2 is opened.

The fines may be conveyed along the screwl conveyors lL1 L2 either for discharge down the chute J5 or upon reversal of the screw conveyors for any suitable disposition at the opposite ends of such conveyors.

When the ,screen gate D3 is removed all the material passing over the surface D is delivered to the decks E2 and G and thus to the boom M. The masking of the screening section M4 permits the boom M t0 be employed to ship run of mine.

` The refuse, picked from the material undergoing screening is deposited on the refuse It will be apparent from my description and drawings that I have developed a peculiarly flexible picking, screening and conveying system wherein there is a minimum of breakage and degradation, a maximum ease in picking, maximum length of picking stepsiand a very ready and flexible grading and removal of grades and subsequent recombination of grades when desired.-

I claim:

1. In a picking and screening installation, a supporting structure, a screening conveyer member mounted upon said supporting structure and. means for imparting to it a conveying reciprocation, a,plurality of trans- -versely 'disposed' loadingv booms extending acrgss the axis of movement of said conveyer member, a plurality of separate conveying and screening decks upon said conveyer member, said decks terminating in undercutv ldischarge portions overhanging and 'discharging to said loading booms.

2. In a picking and screening installation,A

a supporting structure, a screening conveyer member mounted upon said supporting structure and means for imparting to it a conveying reciprocation, a plurality of transversely disposed loading booms extending across the axis of movement of said convcyer member, a plurality of separate con-l veying and screening decks upon said conveyer member, said' decks terminating in un dercut discharge portions overhanging and discharging to said loading' booms, said decks increasing in effective 'length from top to bottom of the conveyer member, the loading booms beinglongitudinally spaced along said conveyer member.,Y v

3. In a picking and screening installation, a screening conveyor member and means for imparting a conveying movement thereto, a

plurality of transverselyA disposed loading booms associated vwith said conveyor and overlying it, a plurality of undercut decks on said conveyor, said decks terminating in discharge portionsoverhanging and discharging to said loading booms.

4.' In a picking and screening installation, a supporting structure, a screeningconveyer member mounted upon said supporting structure and means for imparting to it a .conveying reciprocation, a plurality of transversely disposed loading Ipooms extend-l ing across the axis of moveme t of said conveyer member, a plurality of separate conveying and screeningdecks upon said conveyer member, said decks terminating in i undercut discharge portions overhanging and discharging to said loading booms, said loading `booms including endless conveyers. v

' 5. In a picking and screening installation, a supporting structure, a screening conveyer member mounted upon said supporting structure and means for imparting to \it a conveying reciprocation, 'a plurality of separate conveying and screening decks upon said conveye'r member, said decks terminating in undercut discharge portions, a plurality ofN transversely disposed endless con'- veyers passing across said screening conveyer member and positioned beneath the discharge portions of said decks and adapted to receive material therefrom.

6. In a picking and screening installation, a screening conveyor member, a /plurality of .transversely disposed loading lbooms as,- sociated with said conveyor, a lurality of decks on said conveyor, said ecks terminating in discharge'portions overhanging and discharging to said loading booms, an endless mixing conveyor generally parallel with said `screening conveyor and discharge 4 means associated with said loading booms and olapted to discharge material to said mixing conveyor.

7. In a picking and screening installation,

a screening conveyor member,a plurality of ltransversely' disposed loading booms associated with said conveyor, a plurality of deckson said conveyor, said decks terminating in discharge portions overhanging and discharging to said loading booms, a mixing conveyor generally parallel vwith said screening conveyor and discharge means associated with said loading booms and vadapted to permit the' discharge material to said mixing conveyor.

8. In a picking and screening installation, a screening conveyor member, a plurality of transversely disposed loading booms associated with said conveyor, a plurality of decks on said conveyor, said decks terminating in discharge portions overhanging and discharging to said loading booms, a mixing conveyor generally parallel with said screening conveyor, 'discharge means as sociated with said loading booms and adapted to discharge material to said mixing conveyor and removable closures associated with said discharge means, whereby to avoid such discharge. p I 9. -In f a picking and screening installation, a supporting structure, a screening conveyer member mounted upon said supporting structure Vand means for imparting to it a conveying reciprocation, a plurality of separate conveying and screening decks'upon said conveyer member, said' decks terminating in undercut discharge portions, a plul rality of transversely disposed longitudinally spaced secondary conveyers passing across the axis of movementoi:l the screening conveyer member, and positioned beneath the.

discharge portions of said decks and adapted to receive material therefrom.

10. In a picking and screening installa- 11. InI a picking andscreening installa? tion,l a screening conveyor member, a plu-v rality of decks on said member, said decks terminating in separate discharge portions,

- a mixing conveyer generallyl parallel with Saidv screening onveyer, and transverse secondary conveyers associated with the vscreening conveyer member and adapted to receive material from the discharge portions of the various decks, and to deliver' the material so received to the mixing conveyer.-

12. In a picking and screening installaf tion, a screening conveyer member a plu- \rality of decks on said member, said decks terminating in separate discharge portions,

a mixing conveyer generally parallel with said screening'conveyer, and transverse secondary conveyers associated with the screening conveyer member adapted to receive material from the discharge portions of the various decks and to conveyit across said mixing conveyer, and discharge means, as-

sociated with said secondary conveyers,

adapted to permit the discharge of material therefrom to said mixing conveyer.

13. In a picking and. screening installation, a primary reciprocating screening conveyor member, a plurality of transversely disposed. secondary endless conveyors associated with said primary conveyor, a plurality of decks4 on said primary conveyor, said decks terminating in discharge portions overhanging and discharging to said sec- 0 ondary conveyors, an endless mixing conveyorgenerally parallel with said primary l reciprocating conveyor, and discharge means associated with said secondary conveyors, adapted to permit the discharge of material 3 5 to said mixing conveyor. l

14. In a picking and screening installa- -tion,=a primary reciprocating screening conveyor'member, a plurality of transversely disposed secondary endless conveyors as-v 40 sociated with said primary conveyor, a plurality of decks on said primary conveyor, said decks terminating in discharge portions overhanging and discharging to said secondary conveyors, an endless mixing conveyor generally parallel with said primary reciprocating conveyor, and discharge means associated with said secondary conveyors, adapted to permit the discharge of material to said mixing conveyor, one of said secondary con-f :.veyors being adapted to discharge to the iipper'. reach of said mixing conveyor and another of said secondary conveyors being adapted to discharge to the -lower reach thereof.

15.In a picking and screening installation, a primary screenin conveyor member, a plurality of transverse y disposed secondary endless conveyors associated with saidrimary conveyor, said secondary c onveyors including transverse nights, connecting members joining said nights, and noor members across'. which said ni hts are adapted to l travel, a plurality of ecks on said primary v conveyor, said.'4v decks terminating'in dis- 5 char'ge portions overhanging and discharging to said secondary conveyors, a mixing conveyor generally parallel with said screening conveyor, .the secondary conve or noor members being provided with v ischarge apertures in alignment with said mixing conveyor, and removable gates therefor.

16. In a picking and screening installal tion, a primary screening conveyor member, a plurality of transversely disposed secondary endless conveyors associated With said primary conveyor, said secondary conveyors -including transverse nights, connecting members joining said nights, and. noor members across which said nights .are adapted to travel, a plurality of decksgeon said primary conveyor, said decks terminating in discharge portions overlianging and discharging to said secondary conveyors, a mixing conveyorgenerally parallel with said screening conveyor, the secondary conveyor noor members being provided with discharge apertures in alignment with said mixing conveyor, chutes extending beneath said apertures and adapted to deliver material to said mixing conveyor, .and removable gates for said discharge members.

17. In a picking and screening installation, a primary screening conveyor'member, a pluralityof transversely disposed secondary endless conveyors associated with said primary conveyor, said secondary conveyors including transverse nights, connecting meinbers joining said nights, and noor members across which said nights are adapted to travel, a plurality of decks on said .primary conveyor, said decks terminating in discharge portions overhanging and discharging to said secondary conveyors, the noor membersl of the upper reaches of said secondary conveyors being provided with screening meinbers adapted to deliver material to the lower reaches of said conveyors.

18. In a picking and tion, a primary screening conveyor member, a plurality of transversely disposed secondary endlessl conveyors associated with `said primary conveyor, said secondary conveyors including transverse nights, connecting members joining said nights` and noor members 'across which said nights are adapted to screening installasaid'secondary conveyors, the noor mem rs of the upper reaches of said secondary conveyors bein provided with screening mem-h bers adapted to deliver material to the lower reaches of' said conveyors, and chute or, hopper members underlying said screening meinbers and overlying said lower reaches.

19. 1n a picking and screening installation,. a primary screeningconveyor member,

a plurality of transversely disposed secondary endless conveyors associated. with said primary conveyor, said secondary conveyorsg including transverse Hights, connecting meinbers joining said ights, and ioor memhers across which said ightspare adapted to travel, a plurality of decks on said primary conveyor, said decks terminating in dischargel portions overhanging and discharg -ing to said secondary conveyors, the Hoor members of the upper reaches of said secondary conveyors being provided with screening members, and chute or hopper members underlying said screening members and overlying the lower reaches of said secondary conveyors, and adapted to deliver the screenings thereto, and a screening conveyor underlying thelower `reaches of said secondary conveyors;` v

20. lln a picking and screening installation, a screening conveyor 'member, a plurality of transversely disposed loading booms associated with said conveyor, a plurality of decks on said conveyor, said decks terminat-y ing in. discharge portions overhanging and discharging to said loading booms, a mixing conveyor generally parallel with said screening conveyor, discharge means associated with said loading booms and adapted to permit the discharge of material to said mixing conveyor; a discharge hopper underlying Lemire' said screening conveyor and said mixingconveyor and discharge means associated with said screening and mixing conveyors and adapted to disdharge thereto. Y

21. ln a picking and screening installation, a primary reciprocating screening conveyor member, a plurality of transversely disposed secondary endless conveyors asso# ciated with, said primary conveyor, a plurality of decks on said primary conveyor,

said decks terminating in discharge portions overhanging and discharging tosaid secondary conveyors cating conveyor, discharge means associated with said secondary conveyors, adapted to permit the discharge of material to saidmix-` ing conveyor, a discharge chute underlying said screening conveyor member and said vmixing conveyor and discharge means asso- Grenen s., maxon.'

an endless mixing conveyor generally parallel with said primary recipro 

